/*
 * Copyright (c) 2022 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
export default class System {

    /**
     * Makes a copy of a array.
     */
    public static arraycopy(src: any, srcPos: number, dest: any, destPos: number, length: number): void {
        // TODO: better use split or set?
        if (src == dest) {
            const tempArray = new Array(length);
            for (let i = 0; i < length; i++) {
                tempArray[i] = src[srcPos + i];
            }
            for (let i = 0; i < length; i++) {
                dest[destPos + i] = tempArray[i];
            }
        } else {
            while (length--) {
                dest[destPos++] = src[srcPos++];
            }
        }
    }

    public static currentTimeMillis(): number {
        return Date.now();
    }
}
